Preparing and preventing and treating method of thick-walled type microcapsule for preventing and treating ephestia elutella

A technology of microcapsules and tobacco powder moth, which is applied in the field of preparation and prevention of thick-walled microcapsules, can solve problems such as limited technology, troubles in tobacco leaf sales, and aggravation of insect infestation, so as to control insect population density, reduce skin irritation, The Effect of Green Persistence

Inactive Publication Date: 2019-10-01
HUAHUAN INT TOBACCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although there are many effective methods for the control of tobacco powder borer in my country's tobacco industry, the application of some technologies is limited by factors such as warehouse conditions, moisture content of tobacco leaves, logistics procedures, and workshop structure.
In recent years, due to changes in the supply and demand of tobacco leaves, the extension of storage time for first-cured tobacco leaves, and the neglect of sanitary corner management in the production and processing links, the occurrence of insects has been aggravated, and the occurrence of tobacco powder borers has further affected the health of tobacco commercial enterprises. Tobacco leaf sales cause problems, therefore, it is necessary to study an effective method to quickly reduce the population density of tobacco powder borers in the primary flue-cured tobacco warehouse and reduce the loss of tobacco leaves.

Method used

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  • Preparing and preventing and treating method of thick-walled type microcapsule for preventing and treating ephestia elutella
  • Preparing and preventing and treating method of thick-walled type microcapsule for preventing and treating ephestia elutella
  • Preparing and preventing and treating method of thick-walled type microcapsule for preventing and treating ephestia elutella

Examples

Experimental program
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Effect test

preparation example Construction

[0037] The preparation method of the pyrethroid thick-walled microcapsules for preventing and treating tobacco powder borer comprises the following steps:

[0038] A. Dissolving the pyrethroid original drug in dichloromethane to obtain a mixed solution, then adding carbamate-modified isocyanate to the mixed solution as a wall material and mixing evenly to obtain an oil phase;

[0039] B. Then dissolve the emulsifier in deionized water, and obtain the water phase under the shear of a high-shear dispersing emulsifier;

[0040] In step C and A, the oil phase is slowly added to the water phase, and a homogeneous and stable oil / water emulsion is obtained by shearing with a high-speed shear dispersing emulsifier;

[0041] D. Remove the dichloromethane in the oil / water emulsion obtained in step B, then obtain the target suspension containing microcapsules, filter and dry to obtain thick-walled pyrethroid microcapsules.

[0042] The original drug of permethrin is any one or more of c...

Embodiment 1

[0060] Example 1: The control effect of pyrethroid microcapsules on tobacco powder borer in the tobacco leaf warehouse of the first flue-cured tobacco leaf purchase point

[0061] The experiment was carried out in the warehouse of the purchasing point of a tobacco leaf producing area in the southeast of China. Before using the medicine, the warehouse cleaning operation was carried out according to its routine measures, and at the same time, a space ULV spray treatment was carried out with a micro-spray device. Afterwards, two warehouses in the warehouse were selected as the treatment rooms for pyrethroid microcapsules. The other two are control warehouses. The treatment room and the control room are both one-story warehouses, and the volume of each room is 1200M 3 , The direction of the warehouse is north-south, the indoor temperature and humidity are consistent, the doors and windows are closed, and different warehouse rooms are isolated. The sanitation frequency was the s...

Embodiment 2

[0066] Embodiment 2: Utilize microcapsules to prevent and control mature larvae of tobacco powder borer in the central warehouse of first flue-cured tobacco

[0067] It is carried out on the 2nd floor of No. 5 Tobacco Leaf Warehouse of Fujian Sanming Tobacco Logistics Center, divided into two areas, A and B, and the space volume of each area is 4800M 3 . There is a fire door in the middle. Area A is treated with pyrethroid microcapsules: dilute the preparation by 10-1000 times, use an electric constant sprayer to spray the medicine on the connection between the wall and the ground, the spray width on the ground is 50CM, and the spray width on the wall is also 50CM. Spray 1 circle around the column, the spray width is also 50CM on the ground, and 50CM on the four sides of the column. Area B was treated with 100-fold dilution of 10% beta-cypermethrin aqueous emulsion. Spray medicine equipment and spraying method are the same as above. During the spraying operation, strive to...

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Abstract

The invention discloses a preparing and preventing and treating method of a thick-walled type microcapsule for preventing and treating ephestia elutella. The method includes the following steps of dissolving pyrethroids original pesticides in dichloromethane to obtain a mixed solution, adding carbamate-modified isocyanate to be mixed to obtain an oil phase, dissolving an emulsifier in deionized water to obtain a water phase, slowly adding the oil phase to the water phase to obtain a homogeneous-phase stable oil / water emulsifier, removing dichloromethane in the obtained oil / water emulsifier toobtain target suspension containing the microcapsule, and conducting filtering and drying to obtain the thick-walled type pyrethroids microcapsule. During prevention and treatment, the thick-walled type microcapsule is diluted to prepare an ephestia elutella spraying liquid pesticide, the microcapsule preparation liquid pesticide is added into a movable electric sprayer and sprayed in a tobacco warehouse, and related data of the ephestia elutella spraying liquid pesticide in the use process is tracked, observed and recorded. The method has the advantages that the microcapsule wall thickness isincreased, the pyrethroids utilization rate is increased, the effective acting time is prolonged, the use frequency of the agent is reduced, and the raw materials are wide in source and low in cost.

Description

Technical field: [0001] The present invention relates to the technical field of tobacco powder borer prevention and control, in particular to a method for preparing and preventing thick-walled microcapsules for preventing and controlling tobacco powder borer, which is suitable for tobacco storage warehouses such as primary tobacco leaf flue-cured tobacco purchase points, central warehouses, and tobacco leaf rebaking enterprises. Tobacco powder borer control. Background technique: [0002] Tobacco powder moth Ephestia elutella (Hübner) belongs to Lepidoptera (Lepidoptera) Phycitidae, also known as tobacco powder moth or tobacco leaf moth. Tobacco powder borer is an omnivorous stored product pest, which mainly harms tobacco leaves, and can also eat wheat, soybeans, peas, broad beans, peanuts, cocoa beans, flour and various dried fruits, etc. It is the main pest in the storage process of tobacco. [0003] Tobacco powder borer is widely distributed all over the world. It has be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/28A01N53/08A01P7/04A24B15/34A24B15/18
CPCA01N25/28A01N53/00A24B15/183A24B15/34
Inventor 朱焱程新胜赵权徐其敏孙鸿君窦家宇张家明马建勋刘威
Owner HUAHUAN INT TOBACCO
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